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Chimney "Diffuser" For Outdoor Wood Burning Stoves
“Outside wood boilers use a lot more wood when the wind is blowing. I found a low-cost way to solve that problem,” says Ed Maas, Eden Valley, Minn.
His patent pending “Top Hat” chimney air diffuser is designed to minimize the wind’s ability to siphon heat out. It consists of a stainless steel cylinder with met
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Chimney Diffuser For Outdoor Wood Burning Stoves ENERGY Wood Burners 65 “Outside wood boilers use a lot more wood when the wind is blowing I found a low-cost way to solve that problem ” says Ed Maas Eden Valley Minn His patent pending “Top Hat” chimney air diffuser is designed to minimize the wind’s ability to siphon heat out It consists of a stainless steel cylinder with metal support fins inside which fits over the top of the chimney flue An optional lever kit can be used to adjust the cylinder up or down “When strong winds blow wood consumption is at or more than 50 percent higher than on calm days ” explains Maas “The fast moving air not only sucks the heat out with it it also forces a very rapid burn time of wood If you adjust the damper to control the air flowing through it the fire will starve for oxygen and throttle back the amount of heat produced ” His diffuser knocks down the wind velocity at the top of the chimney by introducing outside air at the top of the flue “When the diffuser is raised up to 75 percent of the air caught in the wind’s siphoning effect is outside air That means far less heat is pulled out the chimney Down-drafts from strong gusts are also reduced ” says Maas The optional adjustment lever makes it easy to raise and lower the unit “When fully lowered the top of the diffuser is located just below the top of the flue pipe That position is for calm days and permits normal draft ” says Maas “When the diffuser is up at its maximum height it’s about 15 in higher than the stove’s chimney The diffuser’s opening is about 3 times larger than the chimney so the chimney is forced to draw most of its air from around the cylinder ” Maas plans to market the Top Hat diffuser and expects it to retail for about $250 Contact: FARM SHOW Followup Ed Maas 56520 365th St Eden Valley Minn 55329 ph 952 486-8821; cell 320 493-2330; edw maas@gmail com A new website is coming but updates will be posted at www therock-star com
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